Ingredients

1 package (10 1/2 ounces) dried udon noodles

1 baby bok choy

1/4 cup smooth peanut butter

5 tablespoons toasted sesame oil

3 tablespoons soy sauce

1/4 cup rice-wine vinegar (not seasoned)

1 large garlic clove, minced

2 teaspoons sugar

1/2 teaspoon crushed red-pepper flakes

Sesame seeds, for garnish

Preparation

Bring a large pot of water to a boil; cook noodles according to package directions. Drain; let cool completely.

Bring 3 cups water to a boil in a medium saucepan; boil bok choy 30 seconds. Drain; rinse well. Let cool; coarsely chop.

Whisk together the peanut butter, oil, soy sauce, vinegar, garlic, sugar, and red-pepper flakes. Put sauce, noodles, and bok choy into a bowl; toss well. Sprinkle with seeds.